asteroid Archives

December 11, 2022December 11, 2022 by Andy Tomaswick

This Interactive Tool Lets you Simulate Asteroid Impacts Anywhere on Earth

Asteroid impacts rank highest on the UN’s list of potentially species-ending calamities. They’ve been the subject of countless movies and books, some of which are accurate depictions of what would happen, and some of which are not. Now, if you’ve ever been interested to see what would happen if different sizes of asteroid impact different areas of the globe, the internet has a tool for you!

November 27, 2022November 27, 2022 by Andy Tomaswick

Astronomers Spotted a Tiny Asteroid A Few Hours Before it Impacted the Earth, and Predicted Exactly Where and When it Would Crash

Humanity is getting better a planetary defense. At least from external threats from outer space. As long as they’re just dumb rocks that follow the laws of physics. And a group of extraordinary humans proved it last week when the planetary defense community jumped into action to accurately track and predict exactly where a relatively small meteor would fall on November 19th.

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July 26, 2022July 26, 2022 by Laurence Tognetti

OSIRIS-REx Would Have Sunk Deep into Asteroid Bennu if it Tried to Land

A pair of studies published in Science and Science Advances have helped identify that NASA’s OSIRIS-REx (Origins, Spectral Interpretation, Resource Identification, Security-Regolith Explorer) spacecraft would have sunk into the asteroid Bennu had the spacecraft not fired its thrusters immediately after collecting samples from the surface of the small planetary body in October 2020. The respective studies examined the loosely packed exterior of Bennu, comparing its surface to stepping into a pit of plastic balls that people of all ages enjoy. The paper in Science was led by Dr. David Lauretta, Principal Investigator of OSIRIS-REx and a Regents Professor at the University of Arizona, and the paper in Science Advances was led by Dr. David Walsh, a member of the OSIRIS-REx team from the Southwest Research Institute in Boulder, Colorado.

February 18, 2022February 18, 2022 by Andy Tomaswick

An Asteroid has Been Discovered With Three Moons!

Planets aren’t the only celestial objects with moons – asteroids can have them too. They are usually other, smaller asteroids in orbit around a larger central one. Now, a team of Thai and French astronomers found an asteroid system with three satellites. The new four-body system makes complex gravitational problems like the three-body problem look simple by comparison.

October 8, 2021October 8, 2021 by Andy Tomaswick

This Object is Both an Asteroid and a Comet

In astronomy, comets and asteroids are defined very differently. Comets have a “nucleus,” usually made of ice and dust, and a tail when they get near the sun, which is the nucleus material shedding off from the comet itself. Asteroids, on the other hand, are small balls of rock orbiting the sun. Occasionally though, some objects meet the criteria to be both an asteroid and a comet – and a team from the Planetary Science Institute (PSI) think they have found a new one.

August 4, 2021August 4, 2021 by Andy Tomaswick

Scientists Figure out how the Asteroid Belt Attacked the Dinosaurs

How do you track an asteroid that hit the Earth over 60 million years ago? By using a combination of geology and computer simulations, at least according to a team of scientists from the Southwest Research Institute (SwRI). Those methods might have let them solve a long-standing mystery of both archeology and astronomy – where did the asteroid that killed the dinosaurs come from?

January 5, 2021January 5, 2021 by Evan Gough

Here’s the Asteroid Hayabusa2 is Going to be Visiting Next

The asteroid 1998 KY26 (the point of light located at where the two lines would cross) captured by Hyper Suprime-Cam mounted on the Subaru Telescope. The blurring of the background stars is due to the motion of the telescope tracking the asteroid. Five shots, each with a 2-minute exposure time, taken during 2:04–2:16 on December 10, 2020 (Hawai?i Standard Time) were stacked to create this image. The field of view is 30 x 15 arcseconds. (Credit: NAOJ)

Check out this image of asteroid 1998 KY₂₆ from the Subaru Telescope. It’s not exactly beautiful, but it’s not intended to be. The compelling thing about this image isn’t its attractiveness, it’s the context. This small asteroid is the next target for Japan’s Hayabusa2 spacecraft.

June 5, 2020June 5, 2020 by Evan Gough

Interstellar Oumuamua Was a Dark Hydrogen Iceberg

Artist’s impression of the first interstellar asteroid/comet, "Oumuamua". This unique object was discovered on 19 October 2017 by the Pan-STARRS 1 telescope in Hawaii. Credit: ESO/M. Kornmesser

When Canadian astronomer Robert Weryk discovered `Oumuamua passing through our Solar System with the Pan-STARRS telescope, in October 2017, it caused quite a stir. It was the first interstellar object we’d ever seen coming through our neighbourhood. The excitement led to speculation: what could it be?

There was lots of fun conjecture on its origins. Was it an alien spacecraft? A solar sail? Or something more prosaic?

June 3, 2020 by Paul M. Sutter

The dinosaur killing asteroid hit the Earth at the most devastating possible angle

Impactors strike during the reign of the dinosaurs (image credit: MasPix/devianart)

There are bad days, and then there are really bad days. 65 million years ago, life on Earth – especially if you were a dinosaur – experienced the worst possible bad day, as a giant meteor came crashing down to the surface of our planet, unleashing an inferno followed by decades of nuclear winter. And the worst part? It didn’t have to be so bad.

February 27, 2020February 27, 2020 by Evan Gough

Astronomers Discover a Tiny New Temporary Moon for the Earth. Welcome to the Family 2020 CD3

Meet 2020 CD3, Earth's tiny moon. It may not stick around for long. Image Credit: Catalina Sky Survey

Astronomers are increasingly interested in Near-Earth Objects, or NEOs. There are ongoing efforts to find them all and catalog them all, and to find out which ones might pose a collision threat. Now some astronomers with the NASA-funded Catalina Sky Survey have found a new, tiny, temporary moon for Earth.